Active Member
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[China]
Address: RM 1302 13/7 CHEONG K BUILDING 84-86 DES VOEUX ROAD CENTRAL HK
Contact name:Martin
WESPC (HONGKONG) LIMITED |
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1.Introduction:
Stamford AS440 AVR is a half wave phase controlled thyristor type AVR and forms part of the
excitation system for a brush-less generator. The design employs Surface Mount Technology (SMT)
for high integration of features in a small footprint AVR.
Positive voltage build up from residual levels is ensured by the use of efficient semiconductors in the
power circuitry of the AVR. The power and voltage sensing circuits have separate terminals, allowing
the excitation power to be derived directly from the stator winding for basic applications or from an
auxiliary winding if sustained short circuit performance is required.
The AS440 AVR is linked with the main stator windings and the exciter field windings to provide closed
loop control of the output voltage with load regulation of +/- 1.0%.
The AVR voltage sensing terminals continuously sample the output windings for voltage control purposes.
In response to this sample voltage, the AVR controls the power fed to the exciter field, and hence the main
field, to maintain the machine output voltage within the specified limits, compensating for load, speed,
temperature and power factor of the generator.
A frequency measuring circuit continually monitors the generator output and provides under-speed protection
of the excitation system, by reducing the output voltage proportionally with speed below a pre-settable threshold.
A manual adjustment is provided for factory setting of the under frequency roll off point, (UFRO). This can easily
be changed to 50 or 60 Hz in the field by push-on link selection.
Over excitation conditions are limited to a safe period by a protection circuit within the AVR.
Provision is made for the connection of a remote voltage trimmer, allowing the user fine control of the
generator's output.
An analogue input is provided allowing connection to a Newage Power Factor controller or other external
devices with compatible output.
The Stamford AVR AS440 Voltage Regulator has the facility for droop CT connection, to allow parallel
running with other similarly equipped generators.
2.Technical data:
| Technical specification | |
| Sening input | |
| Voltage | Jumper selectable 100-130V ac 1 phase or 190-264V ac 1 phase |
| Frenquency | 50-60Hz nominal |
| Power input | |
| Voltage | 100-264V ac 1 phase |
| Frequency | 50-60Hz nominal |
| Output | |
| Voltage | 82V dc @200V ac |
| Current | continuous 4A transient 7.5A for 10 secs |
| Resistance | 15 ohms min (10 ohms min when input volts i s less than 175ac) |
| Regulation | +/-1.0% |
| Generator AVR | 2KW,2.5KW,3KW,4KW,5KW,6KW,7KW,8KW,10KW,15KW,etc. |
| AVR Replaced Brands: | Stamford, Lerory Somer, Marathon, Mecc Alte, Marelli, Kutai, Basler, Caterpillar, |
| AS440, AS480, SX440, SX460, MX341, MX321 | |
| R220, R230, R250, R438, R448, R449, R450, R450M, R450T | |
| SE350, DVR2000E+, SR7-2G, UVR6 | |
| M16FA655A, M40FA640A/A,VR3, VR6 | |
| EA04C, EA05A, EA05AF, EA08A, EA15A-2, EA16A (50HZ, 400HZ), EA350, EA440, EA440-T, EP200, EA15A3H, EA63-7, EA42-7, EA63-5, EA64-5 | |
| AVC63-4, AVC63-4A, AVC63-7, AVC63-7F, AVC63-12A1, AVC63-12A2, AVC63-12B1, AVC63-12B2 | |
| AVR-8A, AVR-10A, AVR-10B, AVR-15A, AVR-15B, AVR-20A / GAVR-8A, GAVR-10A, GAVR-10B, GAVR-15A, GAVR-15B, GAVR-20A |
FAQ
Q1: Are you a maunfacture or a trading company?
A: We are a manufacture & Trading company with over 10
years’experience for parts supply service
Q2: Do you have anything Special compete with others
A: We will accord customer’s specail needs to have a special
processing. And we have nearly a year of warranty period. In
addition to the above two points. We also ensure on time delivery.
Q3: How to ensure the quality of products?
A: Our relationship factory product by professional workers. In
addition, We are also testing every product before delivery. And
all material we used as international standard.
Q4: How can i do if i find the quality of the products with
problem?
A: First of all, We have confidence in the quality of our products.
If really found someting wrong. Please provide the picture. We have
warranty within one year. So you can set your heart at rest to buy
our products.
Q5. What is your terms of packing?
A: Generally, we pack our goods in Original box.
Q6. What is your terms of payment?
A: T/T 30% as deposit, and 70% before delivery. We'll show you the
photos of the products and packages before you pay the balance.
Q7. What is your terms of delivery?
A: EXW, FOB, CFR, CIF.
Q8. How about your delivery time?
A: Generally, most of items we keep stock for all season . it will
take 7to 10 days after receiving your advance payment. if we didn’t
have stock ,The delivery time depends on the items and the quantity
of your order. Normaly 4 to 5 days .
Q9. What is your sample policy?
A: We can supply the sample if we have ready parts in stock, but
the customers have to pay the sample cost and the courier cost.
Q10. Do you inspect all your goods before delivery?
A: Yes, we have 100% test before delivery
Q11: How do you make our business long-term and good relationship?
1.Meet small quantity orders and seasonal orders by our sufficient
safety stock;
2.Assure best quality with our complete inspection system before
shipment
3.Ensure timely delivery to customer’s designated site by our
professional management of warehouse and van fleet;
4.Provide in time Feedback tracking and after-sales services to
maximize the customer’s satisfactory.
Our Advantages
1. Original quality and competitive price.
2. Professional work team and quick service.
3. Package complies to Customer’s requirement.
4. Fast delivery, 1-3 days after received your advance payment.
5. Long-time exporting experience.
Our company pays more attention to honesty and credibility, We
guarantee. The object you receive is consistent with pictures.
